Every blog post that took off on Hacker News, ranked by the votes of its best submission. 6,948 posts.
Every monitoring system has to deal with three kinds of performance-related challenges. Firstly, a good monitoring system must receive, process and record incoming data very quickly. Every microsecond counts here. This may not seem obvious from the start but when your system becomes large enough all the tiny fractions…
Quote: if you DO want to get performance from changing mallocs, make sure to test them with your own app Another Quote: in our humble opinion, overall winner...
This is a follow-up to making the rav1d video decoder 1% faster, where we compared profiler snapshots of rav1d (the Rust implementation) and dav1d (the C …
Citus gives you all the greatness of Postgres plus the superpowers of distributed tables. By distributing your data and queries, your application gets high performance—at any scale. The Citus database is available as open source and as a managed service on Azure.
Spoiler: Yes. (But the "why" matters. A lot.)
ReactOS is a free, opensource reimplementation of windows
Raspberry Pi 4 just got a lot cooler! The last four months of firmware updates have taken over half a watt out of idle power and nearly a watt out of fully loaded power
In case you missed it – we got PulseAudio 9.0 out the door , with the echo cancellation improvements that I wrote about . Now is probably a good time for me to make good on my promise to expand upon the subject of beamforming.
tl;dr : Software shadow stacks could deliver up to 8x faster stack trace capturing in the Go runtime when compared to the frame pointer unwinding that landed in go1.21. This doesn’t mean that this idea should escape from the laboratory right away, but it offers a fun glimpse into a potential future of hardware…
Today I want to talk about an issue I was having with UDP sockets in Go, and how I learned more about my program by making use of two tools that ship with Mac OS X called dtruss, and DTrace.
Solving problems by identifying underlying systems
I tried to boot an iOS 12 kernelcache in QEMU: I managed to get as far as IOKit startup before receiving a kernel panic. I learned a lot about how iOS boots up with this project.
Comparing performances I decided to compare the performances of the OpenSource Linux Userspace Emulator that allows you to run x86/x86_64 apps on ARM linux. There are QEMU-user, FEX-emu and Box86/Box64. How to bench Linux userspace emulator Test will consist of the bench I already used a couple of time, and that can…
This is about the “secret ingredient” in my EXE packer kkrunchy, which was used in our (Farbrausch) 64k intros starting from “fr-030: Candytron”, and also in a lot of other …
Apple announced that it would be moving from Intel processors to Arm-based Apple Silicon CPUs for Macs at WWDC 2020. The Apple Silicon-based Mac Book Air and Pro were released in October 2020 with great fanfare.
by Ivan Fratric, Thomas Dullien, James Forshaw and Steven VittitoeIntroMany widely-deployed techn...
I’m going to start this post off with the obligatory list of links to the previous parts in the series if you’re new here and are interested in seeing the full story: 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , and 9 . This is the tale of how I upgraded my Chumby 8 to run a modern Linux kernel.
A few months after my contract with Haiku, Inc. began, I rewrote the implementation of the Haiku kernel’s condition variables (as opposed to our userspace condition variables, which are from POSIX.) As this new implementation has run in Haiku …
One of MRI's big performance problems is that method cache expiry is global. That is, any time you make a change to any class anywhere, the entire VM's method caches get busted at the same time. This is why you'll frequently hear people saying that "calling Object#extend is bad".
I have worked on optimizing the standard library deflate function, and I am happy to announce revised gzip/zip packages, that on x64 is about 30-50% faster with slightly improved compression. Project: https://github.com/klauspost/compress All packages are drop-in replacements for the standard libraries, so you can use…
I once attended a talk by Yoky Matsuoka when I was young – so young, in fact, that I don’t remember when or where the talk was. What I do remember is her telling the story of designing…
Context A few years after I created the Elastic Binary Trees (ebtree) , I started to get some feedback from users who needed to use the...
x86 is back in the general programmer discourse, in part thanks to Apple’s M1 and Rosetta 2 . As such, I figured I’d do yet another x86-64 post.
I sense this sentiment on the internet that RAID is dangerous, that the likelihood of your RAID array failing during a rebuild is almost a certainty, because hard drives have become so large.
As an operating system GNU/Linux has become a mess because of the fragmented nature of the project, the bloatware in the kernel, but mainly because of the manipulation by corporate interests. There exist several technical reasons for when a migration from GNU/Linux to BSD make sense, but this article isn't about that…
tl;dr: Rebuilding a target because its mtime is older than the mtimes of its dependencies, like `make` does, is very error prone. redo does...
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This is the second post in the series about effortless performance improvements in C++. Check the first post to get the full story!
